Metal wheel.



M. LACHMAN.

METAL WHEEL.

APPLICATION FILED JULY 12. 19 1s.

1,215,553. Patented Feb. 13,1917.-

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UNITED- PATENT OFFICE.

mnunrcnnncrmdn, or new YORK, n. vgnssrqiv'on 'ro srnuc'runhr. 'rnnssn'n s'rnnr. WHEEL oouramr, me, on NEW vonx, N. Y., A cozaronsrron or NEW YoRK.

marl n WHEEL.

' Specification of Letters Patent.

Patented Feb. 13, 1917.

. Original application and 1 m, 191e, atrial No. 163,145. Divided and this application filed Jul 12, 1916,

Serial No. 108,875. Y

To all whom it may concern:

Be it known that I, MAURICE LAoHMAN, a citizen of the United States, and a resident of New York, in. the county of New' York and State of New York, have invented certain new and useful Improvements in Metal Wheels, of which the following is a specithe metal around at each opening to form a tubular reinforcement preferably integralwith the material of the disk.

By this construction the substantially. flat structure of the disk'which in its plate form is adapted to bear a load or weight supported by the axle and is little suited to resist lateral stressesor twisting strains is effectually reinforced and a wheel of small weight and pleasing appearance may be successfully produced. Furthermore, no objectionable raw projecting edge of sheet metal exists around the openings in the disk.

a side elevation of a wheel embodying my in: vention.

Fig. 2 is a side elevation of the blank disk from which the structure is produced.

Fig. 3 is an edge view of the same.

Fig. 4 is an enlarged transverse section taken on the line 4, 4 Fig. 1.

Fig. 5 is an enlarged section through the material of the disk at the edge of the openmg. The blank sheet metal disk view in Fig. '3 is formed with opemngs as shown at 1 in Fig. 2 to constitute. spoke por-- tions 4 integral with the continuous rim 2 and with the hub or center portion 3. Holes 8 may be provided in the center portion 3 for attachment of the disk'to standard hubs, as usual in the art, and the rim 2 may be furnished with any style of metal or rubber tire carrying element secured to or formed thereshown' edge with in any desired manner. The opening 5 in the center is for the axle or other supporting spindle. 1

As a plain disk. and not reinforced a wheel. constructed from a sheet metal disk as described might have suflicient strength to support light'loads but would have little re sistance to lateral strain or twisting. To re,-.

inforce the disk to take lateral'strains while preserving its general characteristics as a disk, I propose to fold orturnthe edge of he metal around theopening '6 upon itself as indicated at 15, such folding .or doubling being preferably as shown, a tubular reinforcement at the edges of the flat metal spokes and rim around the openings 1. Also, if desired, the

outer edge of the disk or rim 2 may be similarly formed and likewise the edges of the opening 5 in the hub or center portion 3.

When the segmental openings indicated are rounded as shown at the center portion 3, said reinforcement is preferablycontindone in a manner to form,

ued around-the edge of the opening to. include such-rounded portion. By this'con-,.

struction it will be seen that a se ctlon throu one of the spokes or across the rim part W111- present substantially an I beam section which,

as is well known, is a form of metal section,

well adapted to resist strain in directions at right angles to one another. In the accompanying drawingsFigure 1 is It is obvious that a single 'disk, as shown might be used as a wheel or that a number of the same might. be employed together to make a wheel.

My present application is a division of a 'priorap lication filed by me, Serial No. 103,145, died June 12th 1916.

What I claim asmy invention is: 1. In a sheet metal wheel, a-..-metal disk having openings to form spokes integral with the continuous rim and centerv and a continuous tubular reinforcement around each opening formed of metal integral with the metal of the fiat portion of the disk.

2. In a sheet metal wheel, a sheet metal disk havin opemngs to =form spokes integral with t e continuous rim and center, the

edges of, the flat .nietal spokes and rim around said openings being bent. into. the found a tube.

' 3. In a sheet metalwheel, a sheet metal 4. In a sheet metal wheel, a plate embracing a hub or center portion, spokes or arms radiating therefrom and a continuous" rim all integral and having on the edge of the metalplate around each opening bounded by spokes and rim a tubular reinforcement integral with the metal of the plate.

described.

a 5. In a sheet metal wheel, a sheet metal disk having openings to form spoke,= center and portions all integral,- the edges-of the .flat' metal of said rim and spokes around the openings being bent into the form of a 2') gtubeand a tubular reinforcement around the periphery of the rim as and for the purpose SignedyatNeW-York, in the county of New York andState of New York, this 11th 25 day of July D. 1916.

MAURICE LAOHMAN. Witnesses:

F. B. TOWNSEND, IRENE LErK'owITz. 

